to find out what proportion of the flowers become tripped 

 when insects are entirely excluded. Two of the plants 

 were kept enclosed in netting during the daytime, "but 

 were uncovered during the night. The results obtained 

 are given in Table X^Qll. 



Table X^^ll. 



Showing efficiency of night flying insects. 



Plant 

 number 



Enclosed in netting during 

 entire experiment. 



•.Percentage 

 Percentage : of flowers 

 of flowers '.developing 

 tripped : pods 



Percentage of 

 flowers developing 

 pods on same plants 

 outside of the 

 netting- open to 

 insects 



II--- 

 12--- 

 14--- 

 15--- 

 17--- 



.0 



-0 



-3.92 -- 



-3.03 2.59 



-0 ---..---1.36 



■---1.16 

 



3.57 



-37 . 31 

 ■16.12 

 -56.60 

 -20.51 



Enclosed in netting in 

 •.daytime; open for night- 

 flying insects 



7' 

 10 



•■4.63- 

 -4.60- 



=5.78- 



-35.38 

 -30.35 



(49) 



